/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Helper function to grab the root node from an anim graph. Asserts if anything other than 1 node is found in an anim graph.
the one and only root, if this is an anim graph, or null otherwise
static [UAnimGraphNode_Root](API\Editor\AnimGraph\UAnimGraphNode_Root) * GetAnimGraphRoot ( [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * InGraph )